Steel MG34 / MG42 ammunition box marked bzl

Textbook late war MG34 and MG42 ammunition box marked bzl which indicates production by Friedr. Siemens-Werke. The case is in very good condition retaining up to 985% of the factory paint that would be very hard to upgrade! Interesting is the capital O stencil on one side and the calculations which are noted on the ammo box. Interesting, textbook and untouched MG ammo box in great condition!